Caulk-dispensing device
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United States of America Patent
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Jul 16, 1996
Issued Date -
N/A
app pub date -
May 30, 1995
filing date -
May 30, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A caulk dispenser device for use with conventional caulking cartridges and powered by expanding refrigerant liquid is disclosed. Expanding gases are released into a chamber defined in part by a housing and in part by the caulk cartridge, the plug or piston within the cartridge forming a boundary of the chamber. Discharge of the gas directly against the piston is avoided by the interposition of a deflector surface within the housing reducing the tendency of the caulk to increase in viscosity and bond to the walls of the cartridge or to tilt relative to the cartridge. The propellant liquid-gas material incorporates an increment (e.g. 5%) of perflurocarbon or like compound liquid at ambient temperatures which minimizes the cooling effect resulting from discharge of the gas. Preferably, the device is fabricated of material having a low thermal conductivity such as polymeric material to thereby reduce the cooling effect on the canister of propellant with resultant loss of pressure.
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